chore(deps): update dependency traefik to v2.6.3

This MR contains the following updates:

Package	Type	Update	Change
traefik	Kustomization	patch	v2.6.2 -> v2.6.3

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Release Notes

containous/traefik

v2.6.3

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Bug fixes:

• [plugins] Fix slice parsing for plugins (#​8886 by ldez)
• [tls] Return TLS unrecognized_name error when no certificate is available (#​8893 by rtribotte)

v2.6.3

Compare Source

Bug fixes:

• [plugins] Fix slice parsing for plugins (#​8886 by ldez)
• [tls] Return TLS unrecognized_name error when no certificate is available (#​8893 by rtribotte)

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